Basically, we could not reproduce the issue you described (two content-type in server response header). We tested with Firefox, Chrome, Safari only see ONE content-type either application/x-json or text/html but NOT both.

Basically, we could not reproduce the issue you described (two content-type in server response header). We tested with Firefox, Chrome, Safari only see ONE content-type either application/x-json or text/html but NOT both.

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I think this may have something to do with litespeed's anti-ddos measures. I'm experiencing something similar right now with CURL and file_get_contents connections.